Fluid lifter



Feb. 18, 1930. M. E. WELDON 1,747,277

FLUID LIFTER Filed Sept. 27, 1927 I 11/11 1 1 Ir Q Q gwmwutd'o Man 22am Patented Feb. 18, 1930 UNITED STATES PATENT OFFICE MELVIN, E. WELDON, F IBORGER, TEXAS, ASSIGNOR OF ONE-HALF TO CLIFFORD O.

' MORRISON, OF ZBORGER, TEXAS FLUID LIFTER Application filed September 27, 1927.

This invention relates to a fluid lifter for wells and it consists in the novel features hereinafter described and claimed.

, An object of the invention is to provide apparatus of simple and durable structure adapted to be used for the purpose of flowing oil or water from wells by applying a continuous force of gas or airpressure.

A further object of the invention is to provide means whereby the air or gas pressure may be applied by leading the same through a pipe from the top of the well or in leading the pressure from the casing of the well.

With these objects in view, the structure includes a tube having an enlarged end portion' with a strainer applied thereto and a check valve located therein and disposed above the strainer. A diaphragm partition is located in the enlarged portion of the tube and is provided with openings; The diaphragm partition is provided at its center with a pressure chamber and jets communicate with said pressure chamber and have their opposite ends located within the said openings. The opposite ends of the said jets are provided with check valves. Means are provided for leading the air or gas to the pressure chamber.

In the drawing Figure 1 is a vertical sectional view of the fluid lifter;

Figure 2 is a similar view of a modified form thereof.

The fluid lifter includes a tube 1 adapted to be loweredin a well casing 2, the said tube being provided at its lower end with an enlargement 3 having its lower end closed by a strainer 4. A check valve 5 is carried in the enlargement above the strainer. A diaphragm partition 6 is disposed transversely across the intermediate portion of the enlargement 3 and is provided at its center with a pressure chamber 7. The partition 6 is provided with a number of openings 8. Dis- Serial No. 222,305.

charge nozzles 9 are connected at one end with the pressure chamber 7 and the said nozzles are curved longitudinally and have their discharge ends disposed in the openings 8. The discharge ends of the nozzles are provided with check valves 10. In one form of the invention, an air or gas pipe 11 may be connected with the partition 6 at the pressure chamber 7. In another form of the invention, a pipe section 11' may lead from the pressure chamber 7 and pass through the side of the tube 1 and communicate at its upper end with the interior of the casing 2 at a point above a packer 12, which surrounds the tube 1 and bears against the inner surface of the casing.

The check valves 10 are used in the discharge nozzles to keep the fluid out while the device is being lowered in the well. When the device is in lowered position in the well, the air or gas underpres'sure passes through the pipe 11 or 11 and enters the pressure chamber 7. From the said chamber, the air or gas passes through the nozzles 9 and enters the liquid of the well in the openings 8. Thus, the said liquid is forced in an upwarddirection and is drawn into the enlargement 3 around the edges of the check valve 5. It is not necessary to use the check valve 5 except in very deep wells. The lifter may employ a single nozzle 9 or as many as may be needed to elevate the fluid.

In cases where small lifters are required or used the pressure chamber may be located eccentrically of the diaphragm partition instead of at the center thereof.

I claim v A fluid lifter comprising a tube provided with an enlarged end portion, a partition disposed across said end portion and having a centrally located pressure chamber connected to a source of fluid under pressure, said partition having an eccentrically positioned upwardly tapering jet opening, a nozzle connected at one end with the pressure chamber and having its other end disposed in the jet opening, a partition disposed below the firstnamed partition and having a valve seat, a check valve carried at the discharge end of the nozzle, and a check valve disposed on said seat, the two partitions being spaced from each other to provide a chamber between the lower partition and the first named partition.

In testimony whereof I hereunto afiix my signature.

M'ELVIN E. WELDON. 

